Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Differential ventilatory control during constant work rate and incremental exercise

N C Syabbalo1, B Krishnan, T Zintel

  • 1Department of Medicine, Royal University Hospital, University of Saskatchewan, Saskatoon, Canada.

Respiration Physiology
|July 1, 1994
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Intensive Oral Hygiene Interventions during Therapy of Acute Leukemia May Result in Detrimental Outcomes: A Randomized Clinical Trial.

South Asian journal of cancer·2025
Same author

Does an Audio-Visual Preoperative Patient Education Influence Anxiety and Retention of Information for Impacted Mandibular Third Molar Removal?-A Randomized Blinded Trial.

Journal of maxillofacial and oral surgery·2025
Same author

Factors contributing to non-union amongst dentate mandibular fractures treated by load-sharing miniplate osteosynthesis: a case-control study.

The British journal of oral & maxillofacial surgery·2024
Same author

The Local Route of Administration of Dexamethasone in Impacted Mandibular Third Molar Surgery: A Systematic Review and Meta-analysis of Randomised Controlled Trials and a Critical Narrative Review on the Claimed Advantages of the Local Route.

Journal of maxillofacial and oral surgery·2024
Same author

A study on <i>H-score</i> threshold for p16ink4a immunoperoxidase expression in squamous cell tumours of oral cavity.

Journal of oral and maxillofacial pathology : JOMFP·2023
Same author

Infectious complications in compound mandibular fractures undergoing a delayed surgical intervention - a prospective observational study.

The British journal of oral & maxillofacial surgery·2023
Same journal

Braking of expiratory airflow in obese pigs during wakefulness and sleep.

Respiration physiology·2002
Same journal

Arousal response to hypoxia in newborn mice.

Respiration physiology·2002
Same journal

The oxygen gain of diving insects.

Respiration physiology·2002
Same journal

The role of endothelin-1 in strain-related susceptibility to develop hypoxic pulmonary hypertension in rats.

Respiration physiology·2002
Same journal

Active glottal closure during anoxic gasping in lambs.

Respiration physiology·2002
Same journal

Avian intrapulmonary chemoreceptor discharge rate is increased by anion exchange blocker 'DIDS'.

Respiration physiology·2002
See all related articles

Constant work rate, heavy exercise (CWE) uniquely causes faster, shallower breathing (tachypnea) compared to maximal incremental exercise (MIE). This breathing pattern in CWE is not linked to rising ventilation and may stem from inspiratory muscle fatigue or altered mechanics.

Area of Science:

  • Exercise Physiology
  • Respiratory Control

Background:

  • The breathing pattern during heavy exercise is crucial for gas exchange.
  • Constant work rate, heavy exercise (CWE) is known to induce tachypnea (rapid breathing).

Purpose of the Study:

  • To investigate if the tachypneic breathing pattern observed during CWE is unique to this exercise mode or a general response to high ventilation.
  • To compare breathing patterns during CWE and maximal incremental exercise (MIE) at matched ventilation levels.

Main Methods:

  • Ten healthy subjects performed both CWE and MIE on a bicycle ergometer.
  • Breathing patterns were analyzed at ventilation levels equivalent to 80% and 100% of maximum ventilation.
  • Tidal volume and breathing frequency were measured during both exercise types.

Related Experiment Videos

Main Results:

  • During CWE, tidal volume decreased, and breathing became significantly more rapid and shallow at high ventilation levels compared to MIE.
  • This tachypnea during CWE was not correlated with increasing ventilation, oxygen uptake, or heart rate.
  • The breathing pattern during MIE maintained higher, constant tidal volumes.

Conclusions:

  • CWE elicits a distinct tachypneic breathing pattern not seen in MIE, particularly towards the end of exercise.
  • This tachypnea in CWE is not a generalized response to increased ventilation but may be linked to factors like inspiratory muscle fatigue or altered respiratory mechanics.